Tool for setting the teeth of circular saws



S. P. KAY. ooL FOR SETTING mi TEETH oF cmcuLAR sAws.

Patented Aug. 17, 1920.

UNiTEDs'rATEs PATENT OFFICE- y `Bateman P. KAY, oir` aooHEsrnmNEw YORK,AssmNoalor ONE-THIRD To aUFUs P.

wom', ONE-THIRD ToaNNrE K. ,ALL or aooimsrna, NEW Yoan.

ROWND, AND ONE-THIRD T0 ABETHUSA KAY,

Toor. Foa sErTiNG THE TEETH oF CIRCULAR saws.

Specllleation of Letters Patent.

Patented Aug. 17, 1920.

Application led September 8, 1919. Serial N0. 322,447.

Y 10 all whomz't ma concern Be `it known t at I, SAMUEL P. KAY, -acitizen of the United States, residing at Rochester in the county ofMonroe and State of ew York, have invented certain new andusefulImprovements in Tools for Setting the Teeth of Circular Saws, of whichthe following is a specification.

The object of this invention is to provide a new and improved method andtool for setting the teeth of circular saws.

This and other objects of this invention will be fully illustrated inthe drawing, described in the specification and pointed out in theclaims at the end thereof.

In the accompanying drawing:

Figure 1 is a side elevation of the saw setting tool as it appears `whenclamped to the adjustablefguide of the saw table.

Fig. 2 is a top plan viewof the tool as shown in Fig. 1.

Fig. 3 is across section Yof the arm and pivot pin of the tool, showinghow the clamp holds the tool in place on one side of the guide and inline with the saw.

Fig. 4 is a sectional view of the saw setting roller.

Fig. 5 is a sectional view of a modified form of the roller.

Fig. 6 is a detail view of a section of a grooving saw.

Fig. 7 is a sectional view of one of the teeth of a grooving saw afterbeing swaged the section being taken on the line 7"- x o In the severalfigures of the drawing, like reference numerals indicate like parts.

T'he tool comprises the arm 1 which is made up of Hat bar stock and hasthe handle 2 formed on one end thereof. The other end of the arm 1 has abracket 3 fastened thereto to form a fork 4 thereon in which the sawsetting roller 5 is mounted to rotate. For this purpose the end of thebracket 3 and the end of the arm have the pivot pin 3^ supported betweenthem on which the roller 5 is adapted to rotate.

The bracket 3 is fastened to the arm l by means of suitable bolts orrivets 6 which project through the bracket near the inner end thereofand pass into the arm 1. A bearing 7 is provided in the arm 1 andbracket 3 at the point where the bracket is fastened to the arm, inwhich bearing the bolt 8 is mounted to rotate. This bolt is preferablyprovided with the enlarged, fiat head 8^ which projects out from theside of the arm 1 opposite to the bracket 3. The middle portion of thebolt 8 is adapted to rotate in the bearing 7 while the threaded endthereof, which is of reduced diameter, projects out therefrom to receivethe nut 9 by means of which the bolt 8 is held in place in the bearing7. The reduced threaded end of the bolt provides the shoulder 10 thereonagainst which the nut 9 is tightened so as not to interfere with theeasy rotation of the bolt in the bearing 7. For this reason the shoulder10 is formed slightly beyond the outside of the bracket 3 so that theinner face of the nut 9 cannot come into Contact therewith and causefriction therewith, which would interfere with the free. rotation of thebolt 8 in the bearing of the arm l.

i Any one of the many forms of clamps, one of which is indicated byreference numeral 11 in Figs. 1, 2 and 3, may be used to clamp the toolin place on the guide 12 of the saw table 13. The clamp 11 is hookedover the guide 12 and its stationary member 14 is placed in contact withthe outer face of the nut 9 carried on the bolt 8. The adjustable member15 of the clamp is then screwed against the outside of the guide 12 soas to force the arm 1 toward the inner side of the guide and securelyhold the large head 8 of the bolt against the guide which then forms astationary pivot around which the arm 1 is adapted toswing.

In order that the handle of the arm can be easily moved up or down, aportion of the arm with the handle 2 thereon is bent out away from theguide 12 so that it can be easily taken hold of by the operator.

The roller 5 has the beveled perimeter 16 by means of which the sawteeth are alternately bent outwardly on either side during the processof setting the teeth of the circular saw with the tool heretoforedescribed. This is done as follows:

The tool is first clamped against the uide 12 of the saw table 13 asshown in igs. 1, 2 and 3. Then the guide 12 is moved over the saw tabletoward the cir- (fnl-.tr saw mail the distance between the crnter'r fthe SWW this ner side of the guide l2 equals the distance between thebeveled edge of the roller and the inner side of 'the glllde l2.hejliandle of 'the tool is then raised from tile fhll line position tothe dotted line position as shown in Fig. l. In doing so the .beveled.edge of the roller 5 is brought Y'into Contact With the teeth ol" thesaw and operates to bend the successive teeth of the'saw in oppositedirections to the left or right oi" the saw desk. 'lhat is, one tooth isJforced over the bevel on the left hand side of the roller-and bent f;:to the left of 'the saw disk and the next tooth is forced over thebevel on the right hand side of the roller and thus bent toward the'right of the saw disk `until all of the teeth of the saw have been bent`evenly and successively in an opposite direction. After the roller 5has been held in Contact with the circular saw during one ot therevolutions.y Vall ot" the teeth are set as above pointed out and theroller may be Withdrawn from the saw by rocking the tool back into itsinoperative position.

This process of setting a saw is perfermed on all saws of the Cross outItype on which each tooth is formed in the form of ra small triangle`having `equal sides such as `are shown in the 3h-cular saw illustratediin Fig. l. The `teeth are set in this manner in order that the cnt madeby the saw will be wider than the thickness ofthe disk of the saw.

In the ease of a girooving saw, the teeth of which are formed as shownin Fig. 6, the teeth are not set as above pointed `ont Abut are what iseommonly Called swaged.

For this operation then roller illustrated in Fig. 3b gs ised. insteadof being beveled th1s rol er has a slightly' Curved perimeter `Jrovidedthereon so Athat when it is brought m Contact with the teeth 'in thesaine manner as described in eonn'edtion' with the 'beveled roller thepoints ofthe teeth are flattened out or syraged thereby as illustratedin Vig. "7.

1 claim:

1. In a tool for setting circular sawsgthe :Gembermtin off-fan term, aroller having a beveled edge on each side of the periphery thereofmounted to :rotate loosely onone end of said wrm, a pivot pin passingthrough said arm and projecting out on each side thereof, said pivot pinbeing loosely yrnolrntecl `in said arm, means to hold said pin in placein said arm, and means to clamp said `pin against a stationary member toallow said arm to rook around said pivot pin as the center.

2. Isn a tool for setting circular saws, the combination ol? an arm, aroller having a beveled edge on each side of `the periphery thereofmounted :to `rotate loosely on one end of said arm, a *pi-vot pinpassing through said arm and vpmjeoting out on each side thereof,` saidpivot pin ibeing loosely mountedy in said arm, means to hold said pin inplace' in said erm, means. to clamp said pin against a stationary memberto allow ysaid asl-meto rock around said pivot pin as the center, and ahandle formed on said arm, said handle being olset from said arm itovfacilitate the Iraising and lowering of said arm.

ln testimony whereof y'I atl-ix my signature SAMUEL P. KAY.

